This is a fun little game. No IAP, no ads. The gameplay is simple as can be, while still being challenging
Two cubes move forward, slow at first, but faster and faster, along a path of numerous gaps. You must control both simultaneously, tapping the screen on either half to make the corresponding cube jump. It's a simple game that challenges both in a twitchy fashion and in how well you can multi-task and keep track of the two sides. Levels are randomly generated (or at least randomized).